Information on short run plastic moulding?

What materials are normally used to form moulds for plastic. How do you
stop it sticking to the plastics you are moulding.
Hi there my name is Nicholas Lealand, I am working with a performance
arts company who are doing a show to encourage recycling.
They want to make juggling toys and run workshops with children.
because of the environmental angle they want them to be made from
recycled plastics.
We have a relatively cheep sauce of rechargeable cells and leds so we
plan to make them illuminated too.
I have done a little research and Polly carbonate or HDPE are the
plastics I'm looking at using.
They are both able to be heated without needing to be dried and they
will stay very plastic and not brittle? I have had some luck with using
suction to pull the plastic into a sphere mould. and found a thin film
of hdpe is quite translucent too.
I want to make some rather intricate parts though and i don't know how
to go about this.
Any information would be very helpful and greatly appreciated.
Thanks, Nicholas Lealand.
Te Pooka Toys
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nicholaslealand
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Mold release agents.
For a simple intro check out "Secrets of Building a Plastic Injection Molding Machine" by Vincent Gingery isbn 1-878087-19-3
Don't mind Uncle Al... he's mad because the liberals are trying to restrict CO2 emmisons while those nasty volcanos get away with expelling everything without even a citation from the Serra Club!
Ed
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Ed

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